Rotary pump or motor.



"H. S. 'HELE-SHAW ,& F. L. MARTINEAU.

. ROTARY PUMP 0R MOTOR.

APPLICATION FILED JAN. 24. ms.

3 SHEETSSHEET I.

H. S. HELE-SHAW & F. L. MARTINEAU.

ROTARY PUMP 0R MOTOR.

APPLICATION map JAN. 24, l9l6.

3 SHEETSSHEET 2 H. s. HELE-SHAW & F.- L. MARTINEAUQ.

ROTARY PUMP 0R MOTOR.

APPLICATION FILED JAN. 24, I916.

3 SHEETS-SHEET a.

Patented Dec. 18, 1917.

rmirnn sra'rss PATENT ora ion.

HENRY SELBY HELE-SHAW AND FRANCIS LEIGH MARTIN EAU, OF LON DON,ENGLAN1). I

ROTARY PUMP OR MOTOR.

Specification of Letters Patent.

Patented Dec. 18, 1917.

Application filed January 24, 1916. Serial No. 73,989.

To all whom it may concern:

Be it known that we, HENRY SELBY HELE- SHAW and FRANcrs LEIGH MARTINEAU, both subjects of His Majesty the King of. Great Britain, and residents of London, England,

to pumps or motors of the type wherein a cylinder body rotates about 'a stationary-central valve and the pistons within the cylinders derive their movement of reciprocation by cooperation without definite attachmentv with an eccentrically situated ring, which ring revolves or floats around in company with the cylinder body in the manner disclosed in the specification of prior Letters Patent, granted to Henry Selby Hele-Shaw,

The object of the present invention is to simplify the construction to reduce the cost of manufacture and render certain of the internal parts interchangeable and more readily accessible and to eliminate noise. The invention consists of a particular construction and arrangement, the primary feature of which is the usethroughout of plain 0 bearings which involves special means of effecting lubrication. Another feature consists in the provision of a removable fitment carrying the inlet and outlet pipes and the usual make up valves, and this involves the provision of a central valve designed to accommodate this fitment.

Another feature consists of the method of making the central valve designed for siinplicity and cheapness of manufacture. The

0 invention is illustrated in the accompanying drawings wherein Figure l is a front elevational view partly in section of a pump or motor constructed in accordance with and embodying the essential features of the in-- vention.

Fig. .2 is an end elevational view on line A-A of Fig. 1, Fig. 3 is an end section through the line B-B of Fig. 1.

Fig. 4 is an outside elevation of the central valve, and Fig. 5 is a. transverse sectlon thereof. Fig. 6 is a detail view showing more particularly the parts 6, 7 8 and 9.

Referring to these drawings the numeral 1 designates a central cylindrical casing member and this casing member is closed upon either side by means of circular side Walls 2 provided with stufling box bearings 3 to sup port the central shaft 4. and glands or stuffingboxes 6 and 7 may be provided if necessary to accommodate and guide the cylindrical casing which may conveniently have a' central rod 8 and parallel side rods 9. These glands 6 and 7 are preferably arranged lying in the same direction and immediately opposite one another so that the side walls of the casing are interchangeable, that is to say,

by turning the right hand side wall around,

it can be arranged on the left hand side and similarly, the left hand side wall can be arranged upon the right hand side if desirable. The part 19 is a sliding block Which carries the bearings in which the stroke controlling drum 11, inclosing the cylinder body is mounted. The member 11 and the cylinder body rotate together but Whereas the cylinder body is mounted upon a fixed center the "alve, the drum 11 is pushed bodily rom side to side by the member 8 so as to vary the stroke of the piston, this drum further controlling thedirection of delivery. These outer side walls are provided with wells or oil receiving ridges 10 adapted to catch lubricant which is delivered to them in the form of spray as the eccentric ring or drum 11 rotates in the manner Well known. The eccentric ring, which is usually provided with means such as the rods 8, 9 before referred to, whereby its position relative to the central axis of the machine can be varied to vary the ,stroke of the pistons of the machine, is ;r'nounted to rotate upon plain bearings 12/preferably faced with white metal 13 and at one or more positions a felt or other pad 14 extends through the white metal into wiping contact with the surface which rotates against it and this pad may be kept in position by means of the spring 15 ing. The passage or passages 16 lead from this recess to the pad 14 and effectually lubricate it as will be readily understood upon reference to Fig. 3 of the drawings. It

all

eel

will be understood that the recesses 18 are of such a length that there is communication with the passages 17 in all positions of the tons, a contlnuous passage or passages 16 can be provided leading directly from the oil well or ridge to the pads and the re cesses 18 would be unnecessary.

The pistons 20 cooperate with tracks 21 upon the eccentric ring or drum 11 through rollers 22 which are mounted upon pins 23 passing through the pistons and through slots 24: in the walls of the cylinders 25. These rollers 22 are plain bearing rollers brushed or faced with white metal'26 and their bearings are lubricated preferably by means of channels 27 having branches 28 cut or drilled in the pins and the lubricant is delivered to these channels from the cylinders 25 of the machinewhere oil is the workingfluid as is usually the case with this type of apparatus-small holes 29 leading from the pistons to the passages aforesaid in the pins. The rollers aforesaid are preferably so formed as to have wider bearing surface upon the pins than their peripheral surfaces where, contact with the stroke controlling ring occurs as is illustrated in Fig.

1 ceives it. This fitment carries inlet and outsystem is automatically made-up" from the make-up tank by suction through the valves 39, one Or the other of which is always in connection with-the suction side of the apparatus. The make-up valves 39 are dupli-- cated and one communicates with a groove 42 cut in the valve, which groove is in communication with the valve passage 31, and the other leads to the chamber l3 which is in communication with the other valve passage 32 which is drilled right through the end 34. Thus one or other of the make-up valves 39 i s-in communication with whicheverof the' tpass'ages 31 and 32 is the suction if s sjage at the moment. It should perhaps "be-here mentioned that while in the foregoing description certain passages and pipes laconic have been referred to as inlet and outlet? passages and pipes respectively, it will be understood that since machines of this type are usually reversible, those pipes and passages designated inlet will become outlet and vice versa if the machine is reversed. The operation of this type ofapparatus is now so well known as to require no further description and suilice it-to Say that the.,cylinder body is keyed or clutched at 4:4 to the driving shaft 4 by which the cylinders are continuously rotated and the pistons 20 reciprocate witha stroke dependent upon the degree of'eccentricity imparted to the stroke controlling ring or drum ll,

and the direction of inlet and discharge will depend upon which side of the axis the drum 11 is adjusted. The machine hereinbefore described and illustrated is specially designed as a pump but it-will be understood that the invention is equally applicable in the case of motors, and in fact the machine described and illustrated would operate as a motor if fluid under pressure were applied to one or other of the passages 31. and 32 of the control valve.

What we claim and desire to secure by Letters Patent is:

1. A hydraulic machine comprising a central valve, a cylinder body rotatable upon said valve and having cylinders formed therein, openings in the cylinders coiiperating with ports in the valve, pistons operating in said cylinders, a stroke controlling ring inclosing the cylinders and cooperating with and efiecting reciprocation of the pistons, plain bearings upon which said stroke controlling ring rotates, oil storage reservoirs in the casing and oil passages leading from said oil storage reservoirs to lubricate said bearings, substantially as specified 2. A hydraulic machine comprising a central valve, a cylinder body rotatable upon said valve and having cylinders formed therein, openings in the cylinders cotiperating with ports in the valvei pistons operating in said cylinders, a stroke controlling ring inclosing the cylinders and coiperating with and efi'ecting reciprocation of the pistons, plain bearings upon which said stroke controlling ring rotates, oil storage reservoirs in the casing, absorbent pads located in openings in said plain bearings, passages leading from said oil storage reservoirs to said pads for lubricating said bearings, substantially as specified.

3. A hydraulic machine comprising a central valve, a cylinder body rotatable upon said valve and having cylinders formed therein, openings in the cylinders coiiperating with ports in the valve, pistons operating in said cylinders, a stroke controlling ring inclosing the cylinders and cotiperating with and effecting reciprocation of the pistons, plain bearings upon which said stroke Mid Elsi

Mill

controlling ring. rotates, oil storage resersaid valve and having cylinders formed therein, openings in the cylinders cooperating with ports in the valve, pistons operat-.

ing in said cylinders, a stroke controlling ring inclosing the cylinders and cooperating with and efi'ecting reciprocation of the pistons,v plain bearings upon which said stroke controlling ring rotates, sliding blocks carrying said bearings, guides on the casing walls between which said blocks slide, oil storage recesses above the upper of said guides, passages leading from said storage recesses to recesses in the upper edges of said sliding blocks and passages in the sliding blocks leading from the recesses in their upper edges to the bearings to be lubricated, substantially as specified.

5. A hydraulic machine comprising a central valve, a cylinder .body rotatable upon said valve and having cylinders formed therein, openings in the cylinders cooperating with ports in the'valve, pistons operatingin said cylinders, pins upon the outer ends of said pistons, rollers rotatable on the pins, plain metal bearings in said rollers, passages in the pins leading to the bearings, passages in the pistons leading from the interior of the cylinders to the passages in the pins whereby working fluid from the inte rior of the cylinders is conveyed to the bearings-of the. rollers, a stroke controlling ring inclosing the cylinders and cooperating with and effecting reciprocation of the pistons, plain bearings upon which said stroke con trolling ring rotates, oil storage reservoirs in the casing, and oil'passages leading from said oil storage reservoirs to lubricate said bearings, substantially as specified.

6. A hydraulic machine comprising a central valve, a coned extension on said valve, a removable fitment receiving said extension, inlet and outlet pipes carried by said fitment, a make-up tank attached to said fitment, non-return make-up valves carried by said fitment and depending into said make-up tank, a cylinder body rotatable upon said valve and having cylinders formed therein, openings in the cylinders cooperating with ports in the valve, pistons operating in said cylinders, a stroke controlling rin-g inclosing the cylinders and cooperating with and efiecting reciprocation of the pistons, plain bearings upon which said stroke controlling ring rotates, oil storage reservoirs in the casing, and oil passages leading from said oil storage reservoirs to lubricate. said bearings, substantially as specified.

In testimony whereof we afix our signatures in presence of two witnesses.

HENRY SELBY HELE-SHAW. F. LEIGH MARTINEAU. 

